Hoping for advice, tips, thoughts. Anyone else have this happen?

Last week I changed my oil. Last night I went to check the oil level, on general purpose & for piece of mind. I pulled the dip stick out, wipe it clean, stuck the dip stick back in the tube, pulled it out, & the yellow plastic stopper(?) with the rubber o-ring seal was gone.....

It was still in the oil level tube / oil pan - f'n thing came off the end of the dip stick.

I terrified of where a piece of it might end up. So I haven't moved or started it. Today after work I jacked up the front end & crawled under it to to see what it would take to drop the oil pan in hopes of finding the plastic & rubber pieces.

I'm not in a very good mood. Seems like a lot of stuff has to come off to get the pan out, and not even sure where to start?

Can anyone chime in? Would rolling engine make the pan / bolts accessible? I'm worried a piece broken crap might get past the oil pump filter, & clog or ruin the oil pump? I can't afford a catstrophic failure. Am I being paranoid?

Any help, does & don'ts, is greatly appreciated!